Regular expression for validating month

javascript, regex, validation

Solution

/^(0[1-9]|1[0-2])$/

Problem

What is the regular expression for validating a month with the leading zero? Passes regular expression: 01,02,03,04,05,06,07,08,09,10,11,12 Fails regular expression: ``` 1, 00, 13 and up. ```

Original source